TWI689692B - Freezer - Google Patents

Abstract

A freezer refrigerator includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable door panels arranged in parallel at the opening; a partition plate along the two aforesaid door panels The gap between them extends to close the gap from the side of the storage room; The partition plate includes: a surface member opposed to the door piece; and a heater unit having a cord-shaped heater arranged to the end of the surface member; The heater includes: a heat generating portion that generates heat by energization; and a base insulating layer covering the heat generating portion; The heater unit has a heat shielding portion that covers the heater disposed on the surface member; the heat shielding portion has a blank portion that exceeds the heater shape of the heater at the end of the partition plate toward the center Fold back sideways.

Description

Freezer

The present invention relates to a freezer refrigerator provided with a split door panel.

In recent years, in the freezer refrigerator, a heater unit has been installed on the partition plate that closes the gap between the door pieces, and the heater is energized according to the surrounding room temperature and humidity, thereby suppressing the Condensers (for example, refer to Patent Document 1). In Patent Document 1, a member made of synthetic resin is used as the surface member of the partition plate, thereby suppressing the occurrence of dew condensation due to a decrease in the temperature of the contact portion with the gasket provided between the door panel and the partition plate. However, the surface member made of synthetic resin is easily deformed in the height direction, and a reinforcement plate is necessary for reinforcement, which complicates the structure of the partition plate.

However, the temperature in the freezer varies depending on the position in the height direction. Therefore, there have been those who adjust the shape of the heater arranged in the partition plate in order to reduce the amount of electric power (for example, refer to Patent Document 2). In Patent Document 2, the amount of heat generated in the upper region of the heater is set to be smaller than the region other than the upper region, thereby suppressing the temperature rise of the upper part of the storage.

Advanced technical literature Patent Literature: Patent Document 1: Japanese Patent No. 5961822 Patent Literature 2: Japanese Patent Laid-Open No. 2015-148366

Problems to be solved by invention

The partition plate is a door piece provided on one side, and is formed to be relatively shorter than the opening of the refrigerator compartment in a manner that the door flap can be opened, and the upper and lower parts of the partition plate are above the top surface and the bottom surface of the refrigerator compartment. There is a gap between them. In addition, in order to close the gap between the upper and lower parts, fins are formed on the upper and lower parts of the gasket. Because the upper and lower fins are exposed to the refrigerator compartment, the temperature is easier to lower than the surface of the partition plate, and condensation is likely to occur. In order to prevent condensation, it is also considered to adjust the heat distribution in the height direction by the shape of the heater as in Patent Document 2, in order to prevent the structure of the partition plate from becoming complicated. However, it is difficult to climb the heater to the upper end and the lower end of the partition plate because the end of the partition plate has a structure such as a screw or the like to which a cover is attached. As a result, at the end in the height direction of the partition plate, dew condensation is likely to occur because it has become a low-temperature fin, and in order to prevent this, it is necessary to increase the electrical conductivity of the heater according to the temperature of the fin.

The present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a freezer refrigerator capable of suppressing condensation at the end of a partition plate while suppressing an increase in an electrical conductivity. Means to solve the problem

The freezer refrigerator of the present invention includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable doors arranged in parallel in the opening; a partition plate along the two The gap between the door pieces extends to close the gap from the storage compartment side; the partition plate includes: a surface member opposed to the door piece; and a heater unit having an end portion arranged to the surface member A cord-shaped heater; the heater has: a heat-generating portion that generates heat by energization; and a basic insulating layer covering the heat-generating portion; the heater unit has a heat-shielding portion that covers the heater disposed on the surface member The heat shielding portion, the blank portion that exceeds the heater shape of the heater at the end of the partition plate is folded back toward the center. In addition, the freezer refrigerator of the present invention includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable doors arranged in parallel at the opening; a partition plate along the 2 The gap between the door panels extends to close the gap from the storage compartment side; the partition plate includes: a surface member opposed to the door panel; and a heater unit having an end portion disposed to the surface member The cord-shaped heater so far; the heater includes: a heat generating portion that generates heat by energization; and a base insulating layer covering the heat generating portion; two or more additional layers are provided between the base insulating layer and the surface member An insulating layer; the heater unit has a heat shielding portion covering the heater arranged on the surface member; the heat shielding portion is blank at the end of the partition plate beyond the heater shape of the heater The part is folded back to the central side. In addition, the freezer refrigerator of the present invention includes: a refrigerator body having an opening and forming a storage room; two freely openable and closable doors arranged in parallel at the opening; a partition plate along the 2 The gap between the door panels extends to close the gap from the storage compartment side; the heater cover; the partition plate includes: a surface member opposed to the door panel; and a heater unit having a surface disposed on the surface A cord-shaped heater up to the end of the member; the heater has: a heating portion that generates heat by energization; and a basic insulating layer covering the heating portion; between the basic insulating layer and the surface member, 2 is provided An additional insulating layer of more than one layer; the heater unit has a heat shielding portion covering the heater arranged on the surface member; the heat shielding portion is a heater beyond the heater at the end of the partition plate The blank portion of the shape is folded back toward the center side; the heater cover, which covers the heater unit arranged on the surface member, is formed at the end of the heater cover between the surface member and the surface member A predetermined gap is formed and a heater pressing portion extending inside and sandwiching the end of the aforementioned heater is formed. In addition, the freezer refrigerator of the present invention includes: a refrigerator body having an opening and forming a storage room; two freely openable and closable doors arranged in parallel at the opening; a partition plate provided with For the surface member opposite to the door panel, it extends along the gap between the two door panels to close the gap from the storage compartment side; when the door panel is closed, the door and the surface member are in close contact Gasket; the partition plate includes: a heater unit having a cord-shaped heater arranged to the end of the surface member; the heater has: a heat generating portion that generates heat by energization; and a coating of the heat generating portion The base insulating layer of the above; between the base insulating layer and the surface member, two or more additional insulating layers are provided; the gasket has a fin that covers the front opening edge of the storage compartment and the partition plate The gap at the end; the heater extends in a repeating region of the surface member that overlaps with the fin. Invention effect

According to the freezer refrigerator of the present invention, the insulation coating of the heater inside the partition plate is constituted by one basic insulation layer and two or more additional insulation layers, thereby realizing the diameter reduction to increase the freedom of the heater shape and enabling heating The device climbs to the end of the divider. Therefore, it is possible to increase the temperature of the end of the partition plate, and it is possible to suppress the condensation on the end of the partition plate while suppressing the increase in the electrical conductivity.

Hereinafter, the freezer refrigerator (refrigerator 100) of the present invention will be described with reference to the drawings.

Embodiment 1. Fig. 1 is a front view showing a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is an upper perspective view showing a state where the right door flap in the region R1 of FIG. 1 has been opened. Fig. 3 is a cross-sectional view showing the A-A cross-section of Fig. 1. Based on FIGS. 1-3, the schematic structure of the refrigerator 100 is demonstrated. The arrow X direction indicates the width direction of the refrigerator 100, the arrow Y direction indicates the depth direction of the refrigerator 100, and the arrow Z direction indicates the height direction of the refrigerator 100.

The refrigerator 100 includes a box-shaped refrigerator body 10 whose front face is open, and a plurality of door pieces that block the opening 10a of the refrigerator body 10. In the refrigerator body 10, the outer frame of the refrigerator 100 constituted by an outer box and an inner box (not shown) serves as a box body, and a space between the outer box and the inner box is filled with a foam insulation material (not shown). The gap between the outer box and the inner box is filled with foam heat insulation material to make it integrated, and the outer box and the inner box function as a heat insulation box body.

The inner space of the inner box is divided by a plurality of compartments, for example, from the upper part of the refrigerator body 10, a storage compartment such as a refrigerator compartment 1, an ice-making compartment 2, a switching compartment 3, a freezing compartment 4 and a vegetable compartment 5 is formed . Each storage room is set to a different temperature zone according to its use, and a temperature sensor (not shown) composed of, for example, a thermistor is provided in each storage room. In front of each storage room are provided freely opening and closing doors.

The door panel of the refrigerator compartment 1 is formed by a half-turn rotary door panel, and has a left door panel 7 disposed on the left side of the front of the refrigerator compartment 1 and a right door panel 8 disposed on the right side of the front of the refrigerator compartment 1. In the ice making room 2, the switching room 3, the freezing room 4 and the vegetable room 5, drawer-type doors 6 are respectively provided.

Although not shown, connecting hinges connecting the refrigerator body 10 and the door panel of the refrigerator compartment 1 are provided at both end portions of the outer box in the width direction (arrow X direction). A connecting hinge provided at the left end of the outer box connects the refrigerator body 10 and the left door piece 7. A connection hinge provided at the right end of the outer box connects the refrigerator body 10 and the right door piece 8. Each connecting hinge has a hinge shaft, and the left door piece 7 and the right door piece 8 are opened from the center of the refrigerator body 10 to both sides using each hinge shaft as a rotation axis. A gap Gd between the door blades is provided at the boundary between the left door blade 7 and the right door blade 8 so that the left door blade 7 and the right door blade 8 will not contact each other in the rotation path of the left door blade 7 and the right door blade 8.

Moreover, the hinge part 7a to which the hinge of the upper part of the left door panel 7 is attached is provided with an outside air temperature sensor that detects the outside air temperature, and an outside air humidity sensor that detects the outside air humidity. In addition, the position where the outside air temperature sensor and the outside air humidity sensor are installed is not limited to the hinge portion 7a, as long as it can detect the surrounding environment such as temperature and humidity. In particular, it is preferable to set it at a position where the detected value is not easily affected by the operation of the refrigerator 100. For example, when a condenser tube (not shown) is attached and fixed on the inner side of the side of the refrigerator body 10, if the outside air temperature sensor and the outside air humidity sensor are arranged on the hinge portion 7a, condensation can be reduced The heat effect caused by the tube can correctly detect the surrounding environment.

In addition, the refrigerator 100 includes a partition plate 9 that closes the gap Gd between the door pieces and separates the refrigerator compartment 1 from the external space, and two gaskets that make the partition plate 9 and the door pieces of the refrigerator compartment 1 closely contact 22, 23. The partition plate 9 is a plate-shaped member extending along the gap Gd between the door panels in the height direction (direction of arrow Z), and covers the gap Gd between the door panels from the refrigerator compartment 1 side. The partition 9 is provided on the inner panel 7b of the left door panel 7.

4 is an exploded perspective view showing the structure of the partition plate in Embodiment 1 of the present invention. The structure of the partition plate 9 will be described based on FIGS. 2 to 4. The partition plate 9 has a surface member 30 opposed to the inner panel 7b of the left door panel 7, a heater unit 40 disposed in the surface member 30, and a heater cover 50 covering the heater unit 40 disposed in the surface member 30 .

The surface member 30 is formed of, for example, sheet metal or the like, and transfers heat from the heater unit 40 to the left door piece 7 and the right door piece 8 and two spacers 22, 23, and the like. The heater unit 40 is composed of, for example, a planar aluminum foil heater or the like, and heats the surface member 30 by energization. The heater cover 50 is formed of resin or the like.

5 is a cross-sectional view showing a state before the heater unit of Embodiment 1 of the present invention is attached to a surface member. FIG. 6 is a partially enlarged view of the R2 area of FIG. 4. As shown in FIGS. 5 and 6, the heater unit 40 includes a heat shield 42 composed of a rope-shaped heater 41, aluminum foil, and the like, and a double-sided tape that attaches the heater 41 and the heat shield 42 to the surface member 30. 43.

The double-sided tape 43, the heater 41, and the heat shield 42 are arranged in this order from the surface member 30 toward the heater cover 50. The heater 41 includes a heating portion that generates heat by energization, and is arranged in a meandering manner to form a plurality of folds 41a. The double-sided tape 43 adheres and holds the heater 41 and the heat shield 42 formed in a meandering shape (climbing) inside the surface member 30.

The heat shield 42 covers the heater disposed inside the surface member 30. The heat shield 42 reflects the heat of the heater 41 toward the surface member 30 side, and suppresses the heat movement toward the refrigerator compartment 1 side. The heat shield 42 is formed to have a size larger than the area of the arrangement area of the heater 41 so that it can fix the shape of the heater 41. Therefore, in general, a blank portion is provided on the heat shield 42 from the heater 41 to the end of the heat shield 42 in the width direction (arrow X direction) and the height direction (arrow Z direction). Therefore, in order to maximize the height direction (arrow Z direction) of the heater 41 on the surface member 30 of the partition plate 9, the blank portion 45 exceeding the shape is formed at the upper and lower ends of the heat shield 42 The heater unit 40 is attached to the surface member 30 in a state of being folded back toward the center side.

As shown in FIGS. 2 to 4, the partition plate 9 further includes a heat insulating material 61 disposed on the refrigerator compartment 1 side of the heater cover 50 and a back cover 60. The heat insulating material 61 is formed of expanded polystyrene or the like, and suppresses heat leakage of the heater unit 40 from the heater cover 50 into the refrigerator compartment 1. The back cover 60 is formed of resin or the like, and is attached to the heater cover 50 to hold the heat insulating material 61.

In addition, at the upper end of the back cover 60, the upper hinge 62 and the upper cover 63 are attached by screws 64, and at the lower end of the back cover 60, the spring 65 and the lower are attached by screws 64. The side hinge 66 and the lower cover 67. At both ends of the back cover 60, bearing portions 60a for mounting the upper hinge 62 and the lower hinge 66 are formed.

The upper hinge 62 and the lower hinge 66 connect the left door panel 7 and the partition plate 9 so that the opening and closing operations of the partition panel 9 and the left door panel 7 are linked and rotated. The upper hinge 62 and the lower hinge 66 respectively have shaft portions 62a and 66a as the rotation axis of the partition plate 9, and the shaft portions 62a and 66a are inserted into the bearing portions 60a of the back cover 60, respectively. The spring 65 urges the partition plate 9 toward the left door 7 side.

The upper cover 63 and the lower cover 67 cover the ends of the partition plate 9 in the height direction (arrow Z direction), and are attached to the rear cover 60, thereby maintaining the upper hinges 62 and Underside hinge 66. In addition, a lid groove 63a is formed on the upper portion of the upper lid 63.

The heater unit 40 is attached to the inside of the surface member 30, the heater cover 50 and the hook 31 are fitted, the heat insulating material 61 is placed on the heater cover 50, and the partition plate is installed A back cover 60 such as a hinge is fitted with the heater cover 50 to form the partition plate 9. Then, the upper hinge 62 and the lower hinge 66 are fixed to the inner panel 7b of the left door panel 7 with mounting screws, respectively, whereby the partition plate 9 is attached to the left door panel 7.

The partition plate 9 is attached to the left door panel 7 so that the center of the surface member 30 in the width direction (arrow X direction) coincides with the center of the gap Gd between the door panels formed at the boundary between the left door panel 7 and the right door panel 8. Groove portions 16 are formed in the inner panel 7b of the left door panel 7 and the inner panel 8b of the right door panel 8, respectively. The gasket 22 among the two gaskets 22 and 23 is provided between the surface member 30 and the inner panel 7b of the left door panel 7 and is fitted into the groove portion 16 of the inner panel 7b. On the other hand, the spacer 23 is provided between the surface member 30 and the inner panel 8b of the right door panel 8 and is fitted into the groove portion 16 of the inner panel 8b. A magnet 24 is embedded in each of the pads 22 and 23, and when the left door piece 7 and the right door piece 8 are closed, the surface member 30 and each pad 22 are closely contacted by the magnet 24.

The inner panel 7b of the left door panel 7 and the inner panel 8b of the right door panel 8 have protrusions 7c, 8c protruding in the depth direction (arrow Y direction) to sandwich the partition plate in the width direction (arrow X direction) 9. A gasket 25 is provided between the protruding portion 7c of the left door panel 7 and the partition plate 9. On the other hand, the gasket 23 provided on the right door piece 8 has a rear extension 18 extending between the protrusion 8 c of the right door piece 8 and the right side surface of the partition plate 9, and is suppressed by the rear extension 18 Heat leakage around the partition 9.

In addition, as shown in FIG. 2, a guide portion 15 that guides the rotation of the partition plate 9 is provided on the top surface 11 of the refrigerator compartment 1. The guide portion 15 has a base portion 15b attached to the top surface 11 and a protrusion 15a extending downward from the base portion 15b (see FIG. 7). In a state where the left door piece 7 is closed, the protrusion 15 a of the guide portion 15 is housed in the cover groove portion 63 a formed in the upper cover 63. The edge of the lid groove 63 a slides along the guide 15, whereby the partition plate 9 smoothly rotates.

Next, based on FIG. 2, the operation of the partition plate 9 will be described. When the left door 7 is opened, the partition plate 9 abuts the protrusion 15a of the guide portion 15 on the edge of the cover groove 63a formed in the upper cover 63, and the partition plate 9 performs with the shaft portions 62a and 66a as the rotation axis Turn. At this time, the right side portion of the partition plate 9 is wound backward by the urging force of the spring 65, so that the partition plate 9 and the right door piece 8 can be prevented from contacting. On the other hand, when the left door piece 7 is closed, the right side portion of the partition plate 9 that has been turned to the rear is guided by the guide portion 15 to rotate to protrude from the left door piece 7 to the right. When both the left door panel 7 and the right door panel 8 are closed, the gap Gd between the door panels is blocked, and the intrusion of outside air into the refrigerator compartment 1 from the outside is suppressed.

7 is a longitudinal cross-sectional view showing the upper part of the partition plate in the CC cross section of FIG. 1. 8 is a longitudinal cross-sectional view showing the lower part of the partition plate in the DD cross section of FIG. 1. The structure between the partition plate 9 and the wall surface of the refrigerator compartment 1 will be described based on FIGS. 2, 7 and 8. The partition 9 is formed to be shorter than the front opening of the refrigerator compartment 1 in the height direction (arrow Z direction). Here, the so-called front opening of the refrigerator compartment 1 is the distance between the bottom surface 12 and the top surface 11 of the refrigerator compartment 1. A gap Gt is formed between the upper end of the partition plate 9 and the base 15 b of the guide portion 15 provided on the top surface 11, and a gap Gb is formed between the lower end of the partition plate 9 and the bottom surface 12.

The spacer 22 provided on the left door piece 7 has an upper upper fin 22t formed in the height direction (arrow Z direction) and a lower fin 22b formed in the lower portion, and is formed such that the entire length of the spacer 22 is longer than The length of the partition 9. Similarly, the shim 23 provided on the right door piece 8 has an upper fin 23t formed on the upper portion and a lower fin 23b formed on the lower portion. The entire length of the shim 23 is longer than that of the partition plate 9 length. In FIG. 2, the position of the gasket 23 in the closed state of the right door piece 8 is indicated by a dotted line. Hereinafter, when the upper fins 22t and 23t and the lower fins 22b and 23b are not particularly distinguished, they are referred to as fins.

Each of the upper side fins 22t and 23t extends above the top surface 11 of the refrigerator compartment 1 so as to cover the gap Gt formed on the upper portion of the partition plate 9. In addition, in the width direction (arrow X direction), the upper fin 22t extends from the left door 7 to the right to cover the gap Gd between the doors, and the upper fin 23t extends from the right door 8 to the left to cover the gap between the doors Gd. That is, in the upper gap Gt where the partition plate 9 is not arranged, the two upper fins 22t and 23t overlap to close the gap Gd between the door pieces.

Each of the lower fins 22b and 23b extends below the bottom surface 12 of the refrigerator compartment 1 so as to cover the gap Gb formed in the lower portion of the partition plate 9. In addition, in the width direction (arrow X direction), the lower fin 22b extends from the left door 7 to the right to cover the gap Gd between the doors, and the lower fin 23b extends from the right door 8 to the left to cover the door Gd. That is, in the gap Gb in the lower portion where the partition plate 9 is not arranged, the two lower fins 22b, 23b overlap to close the gap Gd between the door pieces.

Next, based on FIGS. 6-8, the structure of the upper end part and lower end part of the partition plate 9 is demonstrated in detail. At the upper and lower ends of the surface member 30, flanges 32 extending toward the refrigerator compartment 1 side are formed, and screw holes 32a are provided in the flanges 32, respectively. At the upper end and the lower end of the heater cover 50, recessed screw receiving portions 51 are formed, respectively. In addition, at the upper and lower ends of the partition plate 9, the screw 64 is inserted into the screw hole 32 a and is accommodated in the screw accommodating portion 51, thereby fixing the surface member 30 and the heater cover 50.

In each screw accommodating portion 51, the heat insulating material 61 side is opened, and the wall surface portion 51a opposed to the surface member 30 is formed in a semi-cylindrical shape. The screw receiving portion 51 is formed of resin, which separates the screw 64 from the heater unit 40 to prevent the heater unit 40 from being damaged. Between the surface member 30 and the wall surface portion 51a of the screw housing portion 51, a gap Gc (for example, 1.8 mm) greater than the thickness of the heater unit 40 in the depth direction (arrow Y direction) is provided, and the end of the heater unit 40 The portion is arranged in the gap Gc. Here, the gap Gc is the shortest distance between the surface member 30 and the wall surface portion 51a. With such a configuration, the wall surface portion 51a also functions as a heater pressing portion to prevent the heater unit 40 attached to the surface member 30 from floating.

As described above, the blank portion 45 of the heater unit 40 is folded back, so the uppermost bend 41t of the heater 41 is arranged at the upper end of the heater unit 40, and the heater is arranged at the lower end of the heater unit 40 41's lowermost bend 41b. In addition, the screw accommodating portion 51 formed in the heater cover 50 elongates the shape of the heater 41 from the upper and lower ends Lp (see FIG. 12) to the maximum, and enables the heater unit 40 to be attached to the surface member 30 Up to the bottom.

However, the upper fins 22t and 23t are exposed in the refrigerator compartment 1 in the upper gap Gt, and the lower fins 22b and 23b are exposed in the refrigerator compartment 1 in the lower gap Gb. Therefore, in the exposed area, the The temperature is lower than the repeating area where the partition plate 9 repeats. However, in the partition plate 9 described above, since the heater 41 is arranged up to the upper end and the lower end of the surface member 30, a part of the heater 41 overlaps with the fin to suppress the temperature decrease.

In addition, as shown in FIG. 1, the refrigerator 100 includes a control unit 90 that controls the operation of the entire refrigerator 100. The control unit 90 is built in the refrigerator body 10, for example. The control unit 90 controls an unillustrated compressor, air lock device, etc. so that the temperature of each storage room detected by each temperature sensor becomes a preset temperature preset for each storage room. Specifically, it controls the opening and closing of the air lock device based on the difference between the temperature of the refrigerating compartment 1 detected by the temperature sensor and the set temperature of the refrigerating compartment 1, and adjusts the amount of cold air that blows the refrigerating compartment 1. In addition, the control unit 90 calculates the energization rate Pr of the heater unit 40 based on the temperature of the refrigerating compartment 1, the outside air temperature, and the outside air humidity (outside air relative humidity Hout), and gives an energization instruction. The energization rate Pr may be calculated by a known method.

9 is an explanatory diagram showing an example of the energization rate of the heater unit according to Embodiment 1 of the present invention. 10 is an explanatory diagram showing another example of the energization rate of the heater unit according to Embodiment 1 of the present invention. The energization of the heater unit 40 is controlled such that the surface member 30 of the partition plate 9 and the gaskets 22 and 23 around the surface member 30 do not condense to the electrical conductivity Pr. Here, the energization rate Pr is a ratio of the energization time of the heater 41. For example, when energization occurs for 5 seconds out of 10 seconds, the energization rate Pr is expressed as 50%.

For example, the energization rate Pr is calculated by substituting the detected outside air relative humidity Hout into a complex calculation formula that sets the outside air temperature as a parameter. In addition, the reference electrical conductivity varies depending on the structure of the thickness of the partition plate 9, the thermal conductivity of the material, the number of fixed frames W of the heater 41, the set temperature of the refrigerator compartment 1, and the like.

In FIG. 9, the calculation formula is set for each of the three stages of the outside air temperature being 20° C. or lower, higher than 20° C. and lower than 30° C., and higher than 30° C. and lower than 40° C. The rate Pr increases linearly with the increase of the relative humidity Hout of the outside air. In FIG. 9, the electrical conductivity Pr1, Pr2, and Pr3 of the three temperature zones are exemplified. On the other hand, the calculation formula of FIG. 10 is set for three stages, respectively, when the outside air temperature is 20°C or lower, higher than 20°C and lower than 30°C, and higher than 30°C and lower than 40°C The energization rate Pr increases logarithmically with the increase of the outside air relative humidity Hout. FIG. 10 illustrates the electrical conductivity Pr4, Pr5, and Pr6 in three temperature zones.

The calculated formula is stored in the control unit 90 in the form of a program in advance. For example, each calculation formula in FIG. 9 is determined such that the reference energization rate=C1×Hout+C2, and the coefficient C1 and the coefficient C2 are set for each temperature zone of the outside air temperature. In addition, each calculation formula in FIG. 10 is determined so that the reference energization rate=C3×ln(Hout)+C4, and the coefficient C3 and the coefficient C4 are set for each temperature zone of the outside air temperature. Each coefficient can be determined in advance by experiments or the like. In addition, the temperature band for setting the outside air temperature in the calculated formula is not limited to the above three stages, and may be set every 5°C, for example.

11 is a schematic view showing the structure of the insulating layer of the heater unit according to the first embodiment of the present invention. The electrical insulation structure of the heater unit 40 will be described based on FIG. 11. The heater 41 has a core wire 71 composed of a wire or the like, and a resistance wire 72 composed of a nickel-chromium alloy wire or the like. In addition, in the electrical appliance safety law, the heater unit 40 used in the refrigerator 100 must have a double insulation structure. In particular, the heater unit 40 described above is attached to the inside of the non-rechargeable metal part (surface member 30) that may be touched by a person, so the heater unit 40 itself must have a double insulation structure.

In the Electrical Appliances Safety Law, the regulations are as follows. (1) Basic insulation: The thickness of the coating is 0.3 mm or more, or if the withstand voltage is 1.5 kV/min or more, the thickness is irrelevant. (2) Additional insulation: The thickness of the coating is 0.4 mm or more, or 2 layers and the withstand voltage of each layer is 1.5 kV/min or more.

In the past, for example, a resistance wire was spirally wound on a core wire and extruded twice with vinyl chloride (PVC: Polyvinyl chloride), thereby manufacturing a heater having a basic insulating layer and an additional insulating layer that meet the thickness requirements. In this case, as shown in Table 1 below, a core wire with a diameter of 0.6 mm wrapped with a resistance wire with a diameter of 0.08 mm is covered with a basic insulating layer with a thickness of 0.70 mm, and the basic insulating layer is covered with an additional insulating layer with a thickness of 1.00 mm . The finished outer diameter Dh is about 3 mm, and the minimum bending R is about 5 mm.

[Table 1]

In general, when the bending R is smaller than the finished outer diameter Dh, when the surface member 30 is attached, the shape of the heater 41 may not be maintained. Therefore, in general, the minimum bending R is set to be larger than the finished outer diameter Dh.

In the heater 41 of the first embodiment, the insulating layer is formed of a fluorine-based material (ETFE: Ethylene Tetra Fluoro Ethylene), which satisfies the withstand voltage regulations of the Electrical Appliances Safety Law, and at the same time makes the coating thickness thin. Specifically, a core wire 71 with a diameter of 0.14 mm and three resistance wires 72 with a diameter of 0.05 mm is wrapped with a base insulation layer 73 with a thickness of 0.08 mm, and then the base insulation layer 73 is covered with two additional insulation layers 74 and 75 ，来制作热41。 To make the heater 41. The thickness of each additional insulating layer 74, 75 is 0.15 mm, respectively, and the completed outer diameter Dh of the heater 41 is 0.9 mm. In this manner, by reducing the completed outer diameter Dh of the heater 41, the minimum bending R of the cord-shaped heater 41 can be reduced to 2 mm, and the degree of freedom of the shape of the heater 41 can be increased.

In the heater 41, three resistance wires 72 are juxtaposed and spirally wound on the core wire 71. Here, the number of the resistance lines 72 is three, which is caused by lengthening the heater 41 in order to increase the degree of freedom of shape in the state where the heater is fixed to the same level as in the past. The number of resistance wires 72 may be changed according to the required heater size and shape.

12 is a schematic view showing the shape of the heater unit according to the first embodiment of the present invention. Here, the heater is rated at 100V and 11.1W. As described above, the cord-shaped heater 41 is sandwiched and fixed to the surface member 30 by the heat shield 42 and the double-sided tape 43. The heater 41 is formed such that the upper and lower end distance Lp (for example, 781 mm) of the shape as the distance between the uppermost bend 41t and the lowermost bend 41b of the shape is longer than the upper and lower end distance (for example, 754 mm) of the shape in the past heater. This is to make the heater as close as possible to the upper gap Gt and the lower gap Gb of the partition plate 9. The shape is formed such that a part of the shape overlaps the fin, thereby preventing the temperature of the area exposed to the refrigerator compartment 1 in the fin from excessively lowering, and suppressing condensation.

In the past heater, if you want to climb the shape to the end of the partition plate 9 in the height direction (arrow Z direction), it is because the screw 64 that fixes the upper cover 63 and the lower cover 67 are fixed Screw 64 protrudes from the inside, so the heater 41 cannot be set to the end. On the other hand, in the partition plate 9 of the first embodiment, a screw housing portion 51 is formed in the heater cover 50, the blank portion 45 of the heater unit 40 is bent toward the center, and the heater 41 is reduced in diameter. Thereby, a part of the shape can be arranged in the gap Gc of the surface member 30 and the screw accommodating portion 51.

[Table 2]

In Table 2, regarding the shape of the heater in FIG. 12, the shape of the heater 41 and the distance between the end surfaces of the partition plate 9 are compared with the past example. As shown in Table 2, FIG. 7 and FIG. 8, the distance Lt between the uppermost bend 41t of the shape and the upper end surface of the partition plate 9 is 6.2mm in the heater unit 40, and 15.5 in the past example . In addition, the distance Lb between the lowermost bend 41b of the shape and the lower end surface of the partition plate 9 is 4.2 mm in the heater unit 40, and 9.2 mm in the conventional example.

In this manner, in the heater unit 40, the distances Lt and Lb can be shortened to within 7 mm, and the overlapping areas of the shapes in the upper fins 22t and 23t and the lower fins 22b and 23b can be widened. Therefore, when comparing at the same energization rate, the temperature of the fin can be raised more than in the past, and condensation can be suppressed.

In particular, as shown in FIG. 12, the shape is formed such that when the number of folds 41 a of the heater 41 in the upper and lower ends of the partition plate 9 is greater than the central portion of the partition plate 9, it is possible The heat density Hd (W number) at the upper end and the lower end where the temperature tends to decrease increases. Therefore, it is possible to suppress the temperature drop in the fins, and at the same time, make the temperature difference in the height direction (arrow Z direction) of the partition plate 9 small, and it is possible to suppress the condensation at the minimum energization rate.

Fig. 13 is a diagram showing the heat density distribution of the heater unit according to Embodiment 1 of the present invention. The horizontal axis represents the height position Zp in the partition plate 9, and the vertical axis represents the heat generation density Hd[W] of the heater unit 40. The heat generation density distribution of the heater unit 40 is indicated by a solid line, and the heat generation density distribution of the heater unit in the past is indicated by a broken line. On the horizontal axis, the scale 1 indicates the upper end of the partition plate 9 and the scale 31 indicates the lower end of the partition plate 9. In FIG. 13, the height position Zp of the partition plate 9 is divided into 29 points between the upper end and the lower end of the partition plate 9, and the heat generation density at each height position Zp is calculated. The heat generation density distribution of the heater unit 40 and the heat generation density distribution of the conventional example are calculated using the same fixed-frame W number.

In comparison, the heater unit 40 is larger than the conventional example in terms of the heat generation density Hd at the height position Zp (for example, scales 1 to 3 and scales 29 to 31) overlapping with the fin. This is because the minimum bending R of the heater 41 is smaller than in the past, and many shapes can be provided in the region overlapping the fin. In addition, the reason why the heat generation density Hd is smaller than in the past at the center position of the partition plate 9 (for example, the scale 16) is because the heat generation density Hd is concentrated at the upper and lower ends when the fixed frames are the same. In this way, by making the heat generation density Hd higher than the center portion at the upper and lower end portions of the partition plate 9, the condensation resistance can be improved with the minimum heater input (that is, the energization rate).

In this embodiment, the shape is adjusted so that the heat density Hd in the region overlapping with the fin is about 0.6 to 0.7 W. This is because the surface temperature of the partition plate 9 and the temperature of the fin portion are considered when the refrigerator compartment 1 is 3° C. and the gap at the upper and lower ends of the partition plate is about 5 mm to improve the temperature distribution described later. The heating density Hd of the overlapping region with the fin may also be changed according to the size of the gap Gt in the upper part and the size of the gap Gb in the lower part, but at least the upper and lower sides are each 0.5 W or more, in other words, 4.5% or more of the heater rating.

14 is a graph showing the temperature of the surface of the partition plate and the fins according to Embodiment 1 of the present invention. The horizontal axis represents the vertical part Zh, the left side is the top surface 11 side of the refrigerator compartment 1, and the right side is the bottom surface 12 side of the refrigerator compartment 1. The vertical axis represents the temperature Th of the partition plate 9, upper fins 22t, 23t or lower fins 22b, 23b. It is the measurement result when the setting of the heater is 100 [V] and 11.1 [W] under the environmental conditions where the outside air temperature is 30° C. and the outside air relative humidity is Hout 75%.

The temperature data 83 of the past example shown by the dotted line is the result when the energization rate Pr is 53%. In the height direction (arrow Z direction), the temperature Tp of the center portion of the partition plate 9 is 35°C, and the temperature Tp of the upper fins 22t and 23t and the lower fins 22b and 23b (fins) is about 27°C. In each part, the dew point temperature is 25.8°C or higher, but the temperature difference between the fin and the center is large, and the temperature distribution is poor. In the past, the energization rate was set in conjunction with the fins, so the temperature in the central part increased excessively, wasting the heater input.

The temperature data 84 shown by a dotted line is the result when the heater unit 40 has the energization rate Pr of 53%. Compared with the conventional example, in the heater unit 40, the temperature of the fin portion rises, the temperature of the central portion of the partition plate 9 decreases, the temperature difference of the entire partition plate 9 becomes small, and a good temperature distribution is exhibited. With respect to the dew point temperature Td, the fin with the lowest temperature among the partition plate 9 and the fin still has a margin, and it is possible to reduce the electrical conductivity Pr before the temperature of the fin reaches the same temperature as in the previous example. The temperature data 85 shown by the solid line is the result of adjusting the electric conductivity Pr so that the temperature of the fin becomes the same temperature as in the previous example. In this case, the energization rate Pr changed from 53% to 34%, a decrease of 19%. Since the rating is 11.1W, the heater input is reduced by about 20% (2W).

As described above, in the refrigerator 100 of the first embodiment, the heater 41 has the heat generating portion (resistance wire 72) and the base insulating layer 73 covering the heat generating portion, and two layers are provided between the base insulating layer 73 and the surface member 30 The above additional insulating layers 74, 75. Furthermore, the heater 41 is arranged up to the end of the surface member 30. By this, the insulating coating structure of the heater 41 inside the partition plate 9 is made up of a base insulating layer 1 plus an additional insulating layer 3 layers in total, thereby reducing the diameter of the heater 41 and changing the minimum bending R The small and improved degree of freedom of the shape enables the heater 41 to climb up to the end of the partition plate 9. Therefore, the temperature of the end of the partition plate 9 can be increased, the temperature difference in the height direction (arrow Z direction) of the partition plate 9 can be reduced, and the increase in the electrical conductivity Pr can be suppressed, while the end of the partition plate 9 can be suppressed Dew condensation.

In addition, at the end of the heater cover 50, a predetermined gap Gc is formed between it and the surface member 30 and a heater pressing portion (wall portion 51a) extending inside is formed to sandwich the end of the heater 41 . With this, the heater unit 40 can be suppressed from floating, and the screws 64 and the like can be separated from the heater 41 to prevent damage to the heater 41, and the heater 41 can be arranged up to the end of the partition plate 9 to suppress the partition plate The temperature at the end of 9 decreases.

In addition, the heater unit 40 has a heat shield 42, and the blank portion 45 that exceeds the shape of the heater 41 at the end of the partition plate 9 is folded back toward the center. As a result, the shape of the heater 41 can be provided over the entire length of the surface member 30, and the amount of heat generated at the end can be increased to further suppress condensation.

In addition, the refrigerator 100 further includes spacers 22 and 23 having fins, and the heater 41 extends in the repeating region of the surface member 30 overlapping the fins. Thereby, it can be arranged so that a part of the heater 41 overlaps with the fin part exposed to the refrigerator compartment 1 and becomes particularly low temperature, and the temperature rise of the fin part can be suppressed and condensation can be suppressed.

Embodiment 2. 15 is a schematic view showing the structure of an insulating layer of a heater unit according to Embodiment 2 of the present invention. In the second embodiment, the insulation structure of the heater unit 140 is different from that of the first embodiment. On the premise of maintaining the insulation withstand voltage, the insulation specifications are changed while ensuring the freedom of the heater shape. This is different from the first embodiment. In addition, in the second embodiment, the items that are not specifically described are the same as those in the first embodiment, and the same symbols are used for the same functions and configurations.

In the heater 141, three resistance wires 172 are wound around the core wire 171 and covered with a basic insulating layer 173, and the basic insulating layer 173 is covered with an additional insulating layer 174. In the second embodiment, the additional insulating layer of the second layer is formed by the insulating sheet 175. The insulating sheet 175 can be composed of, for example, a polyethylene sheet body having a thickness of 25 μm and an insulation withstand voltage of 1.5 kV/min or more (about 5 kV/min). Between the surface member 30 and the string-shaped heater 141, the double-sided tape 143, the insulating sheet 175, and the double-sided tape 143 are sequentially stacked from the surface member 30 side. In this case, based on the balance of workability in manufacturing the heater unit 140 and workability in assembling the partition plate 9 using the heater unit 140, the insulating sheet 175 may be attached to the surface member 30 with a double-sided tape 143 in advance Inside. In addition, instead of using two double-sided tapes 143, the heat shielding portion 142 and the insulating sheet 175 may be glued and attached to each other.

In the partition plate 9, a three-layer insulation structure is provided on the surface member 30 that may be touched by a person, and the side of the refrigerator compartment 1 of the heater 141 is covered with a heat insulating material 61 and a back cover 60, thus ensuring its insulation Sex. That is, on the side of the refrigerator compartment 1, a three-layer insulation structure is provided on the back cover 60 that can be touched by a person.

In the second embodiment, the insulating sheet 175 is used as the additional insulating layer of the second layer. Therefore, it is only necessary to perform extrusion molding twice when manufacturing the heater 141, and the manufacturing process can be reduced. In addition, compared with the case of the first embodiment, in the heater 141, one additional insulating layer covering the heater 141 can be omitted, so that the completed outer diameter Dh can be reduced (for example, 0.6 mm). In this case as well, the minimum bend R of the heater 141 can be about 2 mm, the degree of freedom of the shape of the heater 141 can be improved, and the heater 141 can be arranged up to the upper end and the lower end of the partition plate 9.

In addition, two insulating sheets 175 are provided as additional insulating layers between the surface member 30 and the heater 141, and the insulation coating of the heater 141 may be only one layer of the base insulating layer 173. According to such a configuration, since the coating is less, the completed outer diameter Dh of the heater 141 can be made smaller, and the extrusion molding of the heater 141 only needs to be performed once, so the manufacturing process can be further reduced. In this case, it is also possible to attach the overlapping of the two insulating sheets 175 to the surface member 30 in advance.

As described above, in the second embodiment, one layer of two or more additional insulating layers is formed on the heater 141 so as to cover the base insulating layer 173, and the other layer is disposed between the heater 141 and the surface member 30 Insulation sheet 175. By this, as in the case of the first embodiment, the degree of freedom of the shape is increased and arranged at the end of the partition plate 9 to thereby suppress condensation at the end of the partition plate 9, and one additional insulating layer is provided at The outside of the heater 141 can further reduce the diameter of the heater 141 to make wiring easier.

Embodiment 3. 16 is a schematic view showing the structure of an insulating layer of a heater unit according to Embodiment 3 of the present invention. In the third embodiment, the insulating structure of the heater unit 240 is different from that of the first embodiment. In addition, in the third embodiment, items that are not specifically described are the same as those in the first embodiment, and the same symbols are used for the same functions and configurations.

In the heater 241, three resistance wires 272 are wound around the core wire 271 and covered with an additional insulating layer 274, and the additional insulating layer 274 is covered with the additional insulating layer 275. Here, each resistance wire 272 wound around the core wire 271 is covered with the base insulating layer 273. Because the resistance wire 272 is very thin, it is difficult to form the base insulating layer 273 by extrusion molding. In this case, the basic insulating layer 273 may be covered on each resistance line 272 by hot dip brazing. The additional insulating layers 274 and 275 are formed by extrusion as in the case of the first embodiment. With such a configuration, the completed outer diameter Dh can be controlled to about 0.6 mm and the minimum bending R of the heater 241 can be about 2 mm, and the degree of freedom of the shape can be ensured to the same degree as in Embodiment 1. Therefore, it is possible to reduce the energization rate while suppressing condensation on the upper and lower ends of the partition plate 9.

In addition, two layers of insulation coating (the first layer of the base insulation layer and the additional insulation layer) may be provided on the resistance wire, and one additional insulation layer may be coated on the outside thereof.

As described above, in the third embodiment, the base insulating layer 273 is provided to cover the resistance wire 272, and two or more additional insulating layers 274, 275 are formed on the heater 241 so as to cover the base insulating layer 273. By this, as in the case of the first embodiment, the degree of freedom of the shape is increased and it is arranged at the end of the partition plate 9 to suppress dew condensation at the end of the partition plate 9 and the heat generating portion generates heat by energization By directly covering the base insulating layer 273, it can be reliably insulated.

In addition, the embodiment of the present invention is not limited to the above-mentioned embodiment, and various changes can be made. For example, in the refrigerator, the refrigerator compartment 1, the ice making compartment 2, the switching compartment 3, the freezing compartment 4, and the vegetable compartment 5 are arranged from the upper part of the body. In addition, the heater unit 40 may be provided with three or more additional insulating layers.

1‧‧‧Refrigerator 2‧‧‧ Ice making room 3‧‧‧ Switch room 4‧‧‧Freezer 5‧‧‧ Vegetable room 6‧‧‧door film 7‧‧‧Left door 7a‧‧‧Hinge Department 7b‧‧‧Inner panel 7c‧‧‧Projection 8‧‧‧Right door film 8b‧‧‧Inner panel 8c‧‧‧Projection 9‧‧‧ Divider 10‧‧‧Refrigerator body 10a‧‧‧Opening 11‧‧‧Top 12‧‧‧Bottom 15‧‧‧Guiding Department 15a‧‧‧protrusion 15b‧‧‧Base 16‧‧‧ Ditch 18‧‧‧Extended extension 22, 23‧‧‧ gasket 22b, 23b‧‧‧lower fin 22t, 23t ‧‧‧ upper fin 24‧‧‧Magnet 25‧‧‧Padding 30‧‧‧Surface components 31‧‧‧Claw buckle 32‧‧‧Flange 32a‧‧‧Screw hole 40‧‧‧heater unit 41‧‧‧ Heater 41a‧‧‧Return 41b‧‧‧Lowest bend 41t‧‧‧The uppermost bend 42‧‧‧Heat shielding department 43‧‧‧Double-sided tape 45‧‧‧Leave 50‧‧‧ heater cover 51‧‧‧screw receiving section 51a‧‧‧Wall 60‧‧‧Back cover 60a‧‧‧Bearing Department 61‧‧‧Insulation 62‧‧‧Upper hinge 62a‧‧‧Shaft 63‧‧‧Upper cover 63a‧‧‧Cover groove 64‧‧‧screw 65‧‧‧Spring 66‧‧‧Lower hinge 66a‧‧‧Shaft 67‧‧‧ Lower cover 71‧‧‧Core 72‧‧‧Resistance wire 73‧‧‧Basic insulation 74‧‧‧Additional insulation 75‧‧‧Additional insulation 83, 84, 85‧‧‧ temperature data 90‧‧‧Control Department 100‧‧‧Refrigerator 140‧‧‧ heater unit 141‧‧‧heater 142‧‧‧Heat shielding department 143‧‧‧Double-sided tape 171‧‧‧core wire 172‧‧‧Resistance wire 173‧‧‧Basic insulation 174‧‧‧Additional insulation 175‧‧‧Insulation sheet 240‧‧‧ heater unit 241‧‧‧ Heater 271‧‧‧core wire 272‧‧‧Resistance wire 273‧‧‧Basic insulation 274‧‧‧Additional insulation 275‧‧‧Additional insulation Dh‧‧‧Complete outer diameter Gb‧‧‧ gap Gc‧‧‧Gap Gd‧‧‧ gap between doors Gt‧‧‧Gap Hd‧‧‧Fever density Hout‧‧‧Relative humidity of outside air Lb‧‧‧Distance Lp‧‧‧shape distance Lt‧‧‧Distance Pr‧‧‧Energy rate Td‧‧‧Dew point temperature Th‧‧‧Temperature Tp‧‧‧Temperature Zh‧‧‧part Zp‧‧‧Altitude position

[FIG. 1] A front view showing a refrigerator according to Embodiment 1 of the present invention. [Fig. 2] An upper perspective view showing a state where the right door of the region R1 in Fig. 1 has been opened. [Fig. 3] A cross-sectional view showing the A-A cross-section of Fig. 1. [Fig. 4] An exploded perspective view showing the structure of the partition plate in Embodiment 1 of the present invention. [Fig. 5] A cross-sectional view showing a state before the heater unit of Embodiment 1 of the present invention is attached to a surface member. [FIG. 6] Partially enlarged view of the R2 region of FIG. 4. [Fig. 7] A longitudinal cross-sectional view showing the upper part of the partition plate in the CC section of Fig. 1. [Fig. 8] A longitudinal cross-sectional view showing the lower part of the partition plate in the DD cross section of Fig. 1. [Fig. 9] An explanatory diagram showing an example of the energization rate of the heater unit according to Embodiment 1 of the present invention. [Fig. 10] An explanatory diagram showing another example of the energization rate of the heater unit according to Embodiment 1 of the present invention. [Fig. 11] A schematic diagram showing the structure of an insulating layer of a heater unit according to Embodiment 1 of the present invention. [Fig. 12] A schematic diagram showing the shape of a heater unit according to Embodiment 1 of the present invention. [Fig. 13] A diagram showing the heat generation density distribution of the heater unit according to Embodiment 1 of the present invention. [Fig. 14] A diagram showing the temperatures of the surface of the partition plate and the fins according to Embodiment 1 of the present invention. [Fig. 15] A schematic diagram showing the structure of an insulating layer of a heater unit according to Embodiment 2 of the present invention. [Fig. 16] A schematic diagram showing the structure of an insulating layer of a heater unit according to Embodiment 3 of the present invention.

30‧‧‧Surface components

40‧‧‧heater unit

41‧‧‧ Heater

42‧‧‧Heat shielding department

43‧‧‧Double-sided tape

71‧‧‧Core

72‧‧‧Resistance wire

73‧‧‧Basic insulation

74‧‧‧Additional insulation

75‧‧‧Additional insulation

Dh‧‧‧Complete outer diameter

Claims (9)

A freezer refrigerator includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable door panels arranged in parallel at the opening; a partition plate along the two aforesaid door panels The gap between them extends to close the gap from the storage compartment side; the partition plate includes: a surface member opposed to the door piece; and a heater unit having a rope shape arranged to the end of the surface member Heater; the heater has: a heating portion that generates heat by energization; and a base insulating layer covering the heating portion; the heater unit has a heat shielding portion that covers the heater disposed on the surface member; The heat shield portion is folded back toward the center side at the end portion of the partition plate that exceeds the heater shape of the heater. A freezer refrigerator includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable door panels arranged in parallel at the opening; a partition plate along the two aforesaid door panels The gap between them extends to close the gap from the storage compartment side; the partition plate includes: a surface member opposed to the door panel; and A heater unit having a rope-shaped heater arranged to the end of the surface member; the heater has: a heat generating portion that generates heat by energization; and a base insulating layer covering the heat generating portion; the base insulating Between the layer and the surface member, two or more additional insulating layers are provided; the heater unit has a heat shield portion covering the heater disposed on the surface member; the heat shield portion is provided at the end of the partition plate The blank portion in the portion that exceeds the heater shape of the aforementioned heater is folded back toward the center side. A freezer refrigerator includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable door panels arranged in parallel at the opening; a partition plate along the two aforesaid door panels The gap between them extends to close the gap from the storage compartment side; the heater cover; the partition plate includes: a surface member opposed to the door panel; and a heater unit having an end portion disposed to the surface member The cord-shaped heater so far; the heater includes: a heat generating portion that generates heat by energization; and a base insulating layer covering the heat generating portion; two or more additional layers are provided between the base insulating layer and the surface member An insulating layer; the heater unit has a heat shield that covers the heater disposed on the surface member; The heat shielding portion, a blank portion that exceeds the heater shape of the heater at the end of the partition plate is folded back toward the center; the heater cover is a cover for the heater disposed on the surface member In the unit, at the end of the heater cover, a predetermined gap is formed between it and the surface member and a heater pressing portion extending inside and sandwiching the end of the heater is formed. A freezer refrigerator includes: a refrigerator body having an opening and forming a storage compartment; two freely openable and closable door panels arranged in parallel at the opening; a partition plate provided with the door panel For the surface member, it extends along the gap between the two door panels to close the gap from the storage compartment side; when the door panel is closed, the gasket that brings the door panel and the surface member into close contact; The partition plate includes: a heater unit having a cord-shaped heater arranged to the end of the surface member; the heater having: a heat generating portion that generates heat by energization; and basic insulation covering the heat generating portion Between the basic insulating layer and the surface member, two or more additional insulating layers are provided; the gasket has a fin that covers the edge of the front opening of the storage compartment and the end of the partition plate The gap; the heater extends in a repeating region overlapping the fin portion in the surface member; the heater shape of the heater is formed such that the heat generation density in the repeating region is 4.5% or more of the heater rating. As described in any one of claims 2 to 4 of the patent application range, the above-mentioned additional insulation layer is formed on the heater in two or more layers. As described in any of claims 2 to 4 of the patent application scope, one of the two or more additional insulating layers is formed on the heater to cover the basic insulating layer, and the other one is arranged in The insulating sheet between the aforementioned heater and the aforementioned surface member. As described in item 5 of the patent application scope, the heater has a core wire; the heat generating portion is a resistance wire; the basic insulating layer covers the core wire around which the resistance wire is wound; and the additional insulation layer has two or more layers , Formed on the heater to cover the base insulating layer. As described in any one of claims 1 to 4, the freezer refrigerator, the heater unit, and the heater of the heater are shaped so that the heat generation density at the end of the partition plate is higher than the The heat density at the center of the partition plate. As described in any one of claims 1 to 4 of the patent application scope, the heater is arranged between the two ends of the partition plate to form a plurality of folds; the heater shape of the heater is formed In order to make the number of the folds at the end of the partition plate more than the number of the folds at the center of the partition plate.

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